Ventilator



R. BROWN VENTILATOR April Mi, 936.`

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/zrow MJ BROWN VENTILATOR April 14, 1936.

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ons@ ooo@ sono @aes ooaeoooo ooaeoeooeeoooeooea oooeoeoeeooeoooae Patented Apr. 14, 1936` UNITED STATES PATENT OFFICE VENTILATOR Ralph Brown, Wilmette, Ill., assignor to The Adlake Company, Wilrnette, Ill., a corporation of Illinois This invention has to do with ventilators, and is particularly concerned with ventilators of the type used in railway car windows.

In ventilators of this type, the screening ele- 5 ment is constantly being subjected to driving air currents containing cinders, dust, rain, etc., with the result that, in a comparatively short time, clogging occurs and the screen must be replaced with a new one, which replacement necessitates l considerable work since the ventilator has to be taken apart, the old screen disconnected, a new one fastened in its place, and the ventilator put back together again.

One object of the present invention is to prol vide, in a ventilator of the type described, a much needed improvement which permits the screen to be easily and quickly replaced without having to take the ventilator apart. l

Another object of the invention is to provide a novel ventilator screen in the form of a thin, nely perforated sheet metal plate.

While the foregoing statements are indicative in a general way of the nature of the invention, other objects and advantages will be apparent to those skilled in the art upon a full understanding of the improved screen mounting.

In order that the invention may be readily understood, two slightly different structural embodiments of the same are presented herein, but it will of course be appreciated that the invention is capable of being embodied in still other forms coming equally within the scope. of the appended claims.

In the accompanying drawings:

35 Fig. 1 is an outside face view of a sash ventilator equipped with the improvement of the invention;

Fig. 2 is a plan View of the outwardly projecting portion of the ventilator;

Fig. 3 is a horizontal section through the ventilator, taken on the line 3--3 of Fig. l;

Fig. 4 is a vertical section, taken on the line 4-4 of Fig. 1;

Fig. 5 is a face View of the readily replaceable screen used in the ventilator shown in Figs. 1 to 4 inclusive ;Y

Fig. 6 is a face view of a slightly diierent, optionally usable, screen;

Fig. 7 is a vertical section, taken on the line 1-1 of Fig. 6;

Fig. 8 is a fragmentary horizontal section, taken on the line 8-8 of Fig. 6;

Fig. 9 is an outside face view of a sash ventilator equipped with a modified form of the invention;

Fig. 10 is a fragmentary vertical section, taken on the line III-III of Fig. 9;

Fig. 11 is a fragmentary horizontal section, taken on the line II-II of Fig. 9; and

Fig. 12 is a fragmentary view of the readily replaceable screen used in the Ventilator shown in Figs. 9 to 11 inclusive.

Since the improvement which forms the subject matter of this invention is obviously applicable to many different types of ventilators, the structural details of the particular ventilator shown in Figs. 1 to 4 inclusive are not to be considered as limiting the invention in any way. The ventilator shown in those views happens to be substantially the same in construction as that which is disclosed and claimed in the application for patent of Harry D. Sevison led September 12, 1930 under Serial No. 481,400, and accordingly does not require detailed description here.

The ventilator includes an elongated frame I0 which is positioned within the hollow bottom rail II of a` sheet metal sash. The frame Iii is provided, adjacent the inner face of the rail, with a longitudinally extending guide groove I2, and is provided, adjacent the outer face of the rail, with a longitudinally extending row of Ventilating apertures I3 which open into the groove I2 throughout one end only of the latter. The groove I2 contains a hollow resiliently expansible slide I4 which is slightly greater in length than the row of apertures I3 and is adapted to be shifted longitudinally of the groove by means of a finger piece I5, whereby to progressively close off all-of the apertures. The slide I 4 is held within the groove I2 by an inner cover plate I6, which plate is positioned directlyopposite the row of apertures I3 against the countersunk edges of an opening in the inner face of the rail II and is secured to the frame I0 by screws I'I which pass through the edges of the opening into the frame. The cover plate I6 has an elongated slot I8 therein through which all of the apertures I3 are eX- posed when the slide VIll is retracted. The finger piece I5 operates in the slot I8. Y

The Ventilating apertures I3 are exposed through an opening in the outer face of the rail II, and a grid plate I9 is secured against the edges of the opening by a plurality of screws 2li-in this particular instance, eight screwswhich extend through the edges of the opening into the frame I0.

The grid plate I9 is preferably formed as a sheet metal stamping and is provided with a longitudinally extending row of Ventilating apertures 2|. The inner surface of the plate I9 is hollowed out slightly, the marginal edges of the plate being cupped inwardly toward the outer face of the rail l I. The upper edge 22 of the plate I9 is outwardly offset to a certain extent with respect to the other edges, thereby forming a thin upwardly opening pocket between the plate I 9 and the outer face of the rail. This pocket is adapted to receive a replaceable screen 23, which screen may be readily inserted in or withdrawn from the pocket.

The screen 23 consists -of a finely perforated light gauge sheet metal plate of horizontally elongated rectangular form. The screen is provided along its upper edge with an outturned ange 24 which constitutes a nger piece by means of which the screen may be easily graspedY in insertingor removing the same from the pocket. The ange 24 also serves as a stop for.. abutting engagement with the upper outwardly offset edge of .the grid plate I9, whereby to denitely position the screen with respect-to the grid plate.

In order to remove' the screen 23 for cleaning or replacement after the perforations in the same have lled up Withforeignmatter'to such an eX- tent-as to renderthe screen unserviceable, it is merely-necessary to removethe two centrally disposed screws 20 in the upper row. The other screws' 20 d-o not have tofbe removedbecause the only screws which pass vthrough the screen are the tWo above referred to, which screws extend through apertures 25 in the upper portion of the screen. After the screen has been removed, it may be cleaned `very easily. Only a moments time is required toreplace the screening element in a ventilator equipped'vvith this improvement.

In Figs. 6 to8 inclusive is shown a differently constructed replaceable screen 26. The screen 26 lis Vof Ywire mesh construction `and is provided along its uppper edge with a thin sheet metal strip 21. .The-upper edge of the strip V2'! is provided with an'outwardly projecting reversely bent ange 28 which engages with the upperedge of the wire mesh whilethe ends of the strip are provided with `reversely bent tongues 29 which engage with the .finger piece 32 on the screen33 is lcorrespondingly changed. Thisarrangement permits :horizontal endwiseinsertion and withdrawal of the screen.

Instead of' employing one or more of the screws 34 to hold the screen 33-in position, the latter may bemade'sufiiciently narrow to sli-debetween the upper Vand lowerfrows of screws andmay besecured in position by means of a readily releasable latching-device 35. The device 35 may consist ofan outwardly projecting tongue or. embossment 3E on the screen adjacent one end of the latter, which tongue will snap resiliently into an aperture-.3l in thev grid plate. Inorder to release the screen 33, it is merely necessary todisengage the tongue 36 from the edge of the aperture 31 by pressing in the tongue `with the point of a screw `fformthe entrance to the pocket.

2. In a ventilator, the combination with a memt ber having a Ventilating opening therein, of an apertured plate .which is adapted to be positioned against the outer face of the member over the Ventilating opening in the latter, a replaceable screen which is smaller than the plate and is adapted to be positioned against the apertured Yportion of the latter, means for `attaching the plate to the member, and separate means for releasably locking the screen in position, said lock- Ving -means `when released permitting removal of the screen from the platefrom the sam-e side of the ventilator as that against which the plate is positioned without disturbing the plate.

3. The combination with the bottom rail of a sash, and a ventilator set into an opening in the rail, of a grid plate for the ventilator positioned against the outerface of the rail, said grid plate being concave toward the rail and being shaped at one edge to provide a slot opening into the cavity present'between the rail and the concave face of the grid plate, a screen which is slidable into or out of the cavity through the slot, and readily releasable means for locking the screen in the cavity.

4. The combination with the bottom rail of a sash, and a ventilator vset into an kopening in the rail, of a grid plate for the ventilator positioned against 'the'outer face of the rail and provided with an eXteri-orlyaccessible recess, means for connecting the grid plate to the rail, a screen positioned between the grid plate and the rail in said recess, and means associated with the grid plate forlockingthe screen against removal, said locking means upon being released permitting removal of the screen from said recess in the same side of the 'rail'asthe grid plate Without requiring any displacement of the grid plate relative to the rail.

45. The combination, with the bottom rail of a sash, and a ventilator set into an opening in the rail, of a replaceable screen, and a grid plate for the ventilator positioned against the outer face of 

